# First Principles.. (1 Viewer)

Is it examable?

#### Enigma17

##### New Member
umm, i dont think its examinable in 2u mathematics, but i think its examinable in 3U, or extension 1, whatever...

its really easy though... just start from basics... like this a triangle...

#### googy_1985

##### Member
We learnt it in yr 11 in 2 unit masths, although I have never seen it in a catholic or HSC paper .

#### lazychic

##### ** hOnEy_mELdeW **
it is examable!

cos our teacher tells us that we'd get Q's on first principles in da HSC so we gotta know it..

#### Minai

##### Alumni
I vaguely remember it
the f(x+h), limits crap

#### Lazarus

##### Retired
Yes, both differentiation and integration from first principles are examinable.

Differentiation (example):
..lim.......f(x+h) - f(x)
h -> 0............h

Integration (example):
Integral[sqrt(r^2 - x^2)] between -r and r
Use A = (Pi*r^2)/2.

#### Lazarus

##### Retired
Remind me as to what that chapter encompassed?

#### Lazarus

##### Retired
You definitely need to know how to do that, although you wouldn't get more than two or three marks devoted to such questions in the actual exam.

#### blake

##### Member
When I did 3u maths in year 11, my teacher said that it wasnt examiable for the HSC but he was going to exam it

#### manly girl

##### Member
I can honestly say I have never seen Integration First Principals.

#### Morgues

##### Member
all you do is substitute, expand, cancel out and then get rid of the hs because their all approaching 0

#### Enigma17

##### New Member
okkkkkkayyyyyyy then.. looks like i was wrong... maybe you do need to know first principles....

#### blake

##### Member
from the phoenix book there isnt a single question on first principles..

#### Lazarus

##### Retired
It is examinable for the HSC and it's in a few of the past HSC papers (98, I think? can't remember).

Integration from first principles is not often taught, and it's only been asked twice - once in an HSC paper and once in a Catholic trial paper. Both questions involved the integral in the example I posted above, where you were given the equation of a semicircle. You can't integrate it normally, because the function under the square root sign is not linear, but you can use the formula for the area of a circle to calculate an equivalent answer.

#### Angelic_Angel88

##### Miss Guided
Hmmm...

I think it would be best to know it, even though it has only been in two papers

It is, however, very hard to remember

#### fishy89sg

##### Member
1st princples is fun

#### acmilan

##### I'll stab ya
Thanks for bumping a 4 year old thread to tell us that, champ